What Makes Videos Accessible to Blind and Visually Impaired People?

要旨

Videos on sites like YouTube have become a primary source for information online. User-generated videos almost universally lack audio descriptions, making most videos inaccessible to blind and visually impaired (BVI) consumers. Our formative studies with BVI people revealed that they used a time-consuming trial-and-error approach when searching for videos: clicking on a video, watching a portion, leaving the video, and repeating the process to find videos that would be accessible — or understandable without additional description of the visual content. BVI people also reported video accessibility heuristics that characterize accessible and inaccessible videos. We instantiate 7 of the identified heuristics (2 audio-related, 2 video-related, and 3 audio-visual) as automated metrics to assess video accessibility. Our automated video accessibility metrics correlate with BVI people’s perception of video accessibility (Adjusted R-squared = 0.642). We augment a video search interface with our video accessibility metrics and find that our system improves BVI peoples’ efficiency in finding accessible videos. With accessibility metrics, participants found videos 40% faster and clicked 54% less videos in our user study. By integrating video accessibility metrics, video hosting platforms could help people surface accessible videos and encourage content creators to author more accessible products, improving video accessibility for all.

著者
Xingyu Liu
Carnegie Mellon University, Pittsburgh, Pennsylvania, United States
Patrick Carrington
Carnegie Mellon University, Pittsburgh, Pennsylvania, United States
Xiang 'Anthony' Chen
UCLA, Los Angeles, California, United States
Amy Pavel
Carnegie Mellon University, Pittsburgh, Pennsylvania, United States
DOI

10.1145/3411764.3445233

論文URL

https://doi.org/10.1145/3411764.3445233

動画

会議: CHI 2021

The ACM CHI Conference on Human Factors in Computing Systems (https://chi2021.acm.org/)

セッション: Accessible Content Creation

[A] Paper Room 01, 2021-05-10 17:00:00~2021-05-10 19:00:00 / [B] Paper Room 01, 2021-05-11 01:00:00~2021-05-11 03:00:00 / [C] Paper Room 01, 2021-05-11 09:00:00~2021-05-11 11:00:00
Paper Room 01
11 件の発表
2021-05-10 17:00:00
2021-05-10 19:00:00
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